public void ArrayClearTest()
 {
     ArrayStack stack = new ArrayStack();
     stack.Push(10);
     stack.Clear();
     Assert.IsTrue(stack.Size() == 0);
 }
 public void ArraySizeTest()
 {
     ArrayStack stack = new ArrayStack();
     Assert.AreEqual(0, stack.Size());
 }
 public void ArrayPushTest()
 {
     ArrayStack stack = new ArrayStack();
     stack.Push(1);
     Assert.IsTrue(stack.Size() == 1);
 }